An insecticidal granular composition for broadcasting of the granular composition onto a body of water on which insects are to be controlled comprising: a granular carrier of size in range of from 1 to 4 mm； a composition absorbed into the granular carrier comprising a bacterially derived larvicidal active agent and a non-aqueous liquid having a density less than 1； wherein the insecticidal granular composition has an average individual granule density greater than 1 and is adapted to sink in the body of water.
